Type-casting machine



T. F. DUFF TYPE CASTING MACHINE Filed Sept. 18, 192 3 2 Sheets-Sheet 1 uvenl'oz T/zomas F fluff Dec. 23, 1924-.

T. F. DUFF- TYPE CASTING MACHINE Filed Sept. 18,1923 2 Sheets-Sheet 2 Thoma F Duff Gua Patented Dec. 23, 1924.

idioms nitial", "or sroxiinn, WASHINGTON.

TYP -(marine iumcianvn.

Application filed September 1s,' 192a. Serial No. 663,483."

T 0 all whom it may concern,

-Be it known that I, THOMAS F.

Spokane, in Spokane County and Stateof lVashington, have invented certain new and useful Improvements in 'lype-Casting' Machines, of which the following is a specification.

'l he present invention relates to improvements in type casting machines and particularly to the structure involving the discharging means for molten metal from the melting pot.

As is well known in the art because of the intense heatfrom the molten metal to which the mouth piece or discharge portion of the melting pot is subjected. difficulty is encountered when it becomes-necessary to remove-the locking; key or bar -'.preparatory tothe removal of the die'and the plate in? the discharge head of the meltpotl The lockingkeys now 'in use 'coi'ne"wedged" in place "with suc-li'--frieti( mal 'c-onta'ct that i the keys, die members. and

sometimes the 'uidewa s formed 'on'the di charge; head of the 'pot are broken'by blows "iiran attemptft oremovethe'key; thus ref) The results attained with this invention overcome the difficulties encountered with keys now in use and wear and tear upon the parts affected are avoided.

With the above ends in view the invention consists in certain novel features of construction and combinations and arrangements of parts as will be hereinafter set forth and claimed.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein the parts are combined and -arranged i-i' DUFF, accordance with the-best mode-I have thus a citizen of the United. States, residing at far devised fol-the practical applicationof the principles of my invention.

Figure 1-is a sectional view of so much "ofa' standard form of melting pot as s necessary to illustrate the adaptation thereto of my invention? i Figure 211s an 'enlarged'isectional"detail view iof' thedischarge head of the melting pot 1 showing the combination therewith of the device of my"invention.' r

Figure 3"i s ajfa'ceview' showing the dis-- charge head, "the die fan'dthe locking-key in'loc-ked position.

'l igurelfiis! aperspectiye iew of the div plate in p the idischarge *head, detached;

' Fi'gurefti is 'a' transverse sectional vfc "the die plate' at linel 5 5 0f Figure 4.

Figure G' is "a perspective yiew of"the lockingkey ofjmy inventionl 143 The at eiral 1 indicates the "meltin ph ant g standard "construction an'd f designed to ".osc ill'ate oii its ivotj'a as' nsual l he' molfen nieta'lg for use in the casting' machine is fcrce'd by aw phage -3 up athrouhhz ht- 45am; p h Wit in"" the"discharge head and extending -'a i rossthe head is an i-nset socketti as'usual in which I the well "known. forinf-of dieplate "7a is seated? and -the'-- plate has the' nsual longitudinal groove 8 and transverse openings 9 for the passage therethrough of the molten metal from the melting pot. In the face of the discharge head is provided an enlarged groove 10 having an upper undercut longitudinal lip 11 with its inner wall at an inclination of approximately 30 and the lower, undercut lip 12 in the head has its inner face at an approximate angle of at5. The die is designated by the numeral 13 and is fashioned with the usual upper angular face 14 complementary to the lip 11 and a complementary lower angular face 15 complementary to the key as will be described. Openings 16 extend transversely through the die, which is seated in the grooved face of the head and these openings register with the openings 9 of the die plate for passage of molten metal.

The die and its die plate are locked in the sockets and grooves provided therefor by the utilizationof, the locking key17 which p I illofcthe die After theidie has'ibeeiireplaced is a i netal bar ivith outeri'andl linnerplane parallel faces, but provided with an upper angular face 18 complementary to the. face 15 of the die, and a lower angular face 19 complementary to the face of; the lip 12 of the head. Along its lower edge the locking key is pi'ovidednwith a series of.-.spa ced projecting lugs 20, and the lip 12 of the head is fashioned-with spaced complementary notches-21.: These notches may be fashioned in the lip during the manufacture of the machine,- or.-the y. may be'milled by the use of suitable-tools in the lips of existing machines in which case the customary keys are disp'ensedwith and the key illustrated in Figure 6 is utilized. 1

After the die plate and the die ;13 are placed in position, the-Qke'y is slipped in from one :sidevof-tliehead and forced along beneath the dieawi'thits -upper angular face 18 in'contact-with'the-lower face of the die,

anditslloweriilugs w;riding over the face of lip 12. The end of the :key; designated 20' is s'lid'throughthe-space providedtherefor and this end projects slightly, after the key is in?rplace-asuindicated inriFig; 3. In this positiomthe. lugs 20 arej olfset slightly from thenotch'es21 and rest' upon. the face of the lip 12 in-such manner as to securely hold -the.;key-, -die gand its die-plate in rigid positionwiwlhen itbecomes necessary to remove the ,die, the key is first loosened by a tap onitheend 20". which resultsin moving the key to :the right in Fig. 3 sulficiently jiJOPGIIIlliJ the lugs 20 to drop into the notches 21 provided therefor, and this dropping of the key relieves the die from pressureand it-may therefore be removed as usual. It will be apparent that a minimum of frictional contact is provided hetweemthelugs and the lip 12 and this frictional contact may be overcome with facility to insure the necessary, but slight, longitudinal movement of theakeyz for removal or a new one applied, the key may again be lifted and restored to locked position for "effectively" holding the die in position 9 ,l 3e"';'

" 'Having thus fully described my invention, .what I claim as new and desire to secure by Letters Patent is 1. In a machine as described, the combination with a grooved discharge headland a die therein.- of a locking-key. having, frictional contact with said (lie, and spaced frictional devices on said key'foriconta'cir with said grooved head. 1 1

2. In a machine as described,-the combination with a grooved head having a lower lip and spacednotches therein, and

a (lie ,in said grooved'head, of a; locking keyhaving frictionalcontact With said die, and-spaced frictional lugs on said key for contact with said lower lip, and adapted to sea-twin saidwnotchesv whenzthe' key is loosened.

c 1 v a 3. In: a-anachine as described the combination-with .a discharge ihead having a groove: therein and undercut -iupper and Flower lips to. said groove of a die in said groove having dovetail edges; a lock ng key having dovetail edges anjd adapted for frictional contact with the die, spaced frictional lugs on said-key for contact with said lower lip, and notches in said lowerlip to reoeive'saidlugs 4. The combinationaof' a discharge head having a recessed groove and a die-plate and die therein and a locking key having frictional contact with saiddie andvspaced frictional devices on said" key for contact with said grooved-head.

In testimony ture.

THOMAS F. DUFF.

whereof I aflix my signa- 

